Removal of NOx using novel Fe-Mn-Ti compound catalysts at low temperature

摘要

The novel Fe-Mn-Ti compound catalysts were prepared by co-precipitation, based on the lower price and smaller surface area TiO2. Then the cause of high catalytic activity which was represented by the compound catalyst was discussed. X-ray diffraction (XRD) was used to characterize the active phase and its results showed that a new Fe0.33Mn0.05Ti2.52O5 phase was generated for Fe-MnOX-Ti. The Fe0.33Mn0.05Ti2.52O5 played a decisive role on the process of low-temperature SCR. However the effect of catalyst was not observed when the temperature was up to nearly 300°C. Based on the above statement, above 90% conversion of NOX on the Fe(0.5)-MnOX-Ti(400) (the molar ratio of n(Fe)/[n(Fe)+n (Mn)]=0.5 and calcined at 400°C) was achieved among 180°C to 280°C.